Transverse single-spin asymmetries in proton-proton collisions at the AFTER@LHC experiment in a TMD factorisation scheme

Abstract

The inclusive large-$p_T$ production of a single pion, jet or direct photon, and Drell-Yan processes, are considered for proton-proton collisions in the kinematical range expected for the fixed-target experiment AFTER, proposed at LHC. For all these processes, predictions are given for the transverse single-spin asymmetry, $A_N$, computed according to a Generalised Parton Model previously discussed in the literature and based on TMD factorisation. Comparisons with the results of a collinear twist-3 approach, recently presented, are made and discussed.

RevTex4, 12 pages, 36 eps figures. V2: Few paragraphs and comments added. Several references added. Results unchanged. Matches the published version

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• Feasibility Studies for Single Transverse-Spin Asymmetry Measurements at a Fixed-Target Experiment Using the LHC Proton and Lead Beams (AFTER@LHC)
• Phenomenological NLO analysis of eta(c) production at the LHC in the collider and fixed-target modes
• Transverse Single Spin Asymmetry in $p+p^{\uparrow }\to J/\psi +X$
• Transverse spin observables in hard-scattering hadronic processes within collinear factorization
• Comparison of transverse single-spin asymmetries for forward ${\pi }^0$ production in polarized $pp$, $p\mathrm{Al}$ and $p\mathrm{Au}$ collisions at nucleon pair c.m. energy $\sqrt{s_{\mathrm{NN}}}=200$ GeV
• Heavy-ion Physics at a Fixed-Target Experiment Using the LHC Proton and Lead Beams (AFTER@LHC): Feasibility Studies for Quarkonium and Drell-Yan Production
• Effect of sea quarks on single-spin asymmetries $A_N^{W^{\pm }}$ in transversely polarized pp collisions at RHIC